R/C Tech Forums

Go Back   R/C Tech Forums > General Forums > Nitro Off-Road

Reply
 
Thread Tools Search this Thread
Old 10-18-2007, 03:30 PM   #16
Tech Addict
 
Ephidelt490's Avatar
 
Join Date: Nov 2004
Location: Hammond, Louisiana
Posts: 621
Trader Rating: 17 (100%+)
Send a message via AIM to Ephidelt490
Default

No it'll be fine. Just don't let it sit up with fuel in it for a week +. Try leaning your low speed needle a few hours as mentioned earlier.
__________________
[Action Hobbies] [Team Associated] [Futaba] [O'Donnell Fuels] [JConcepts] [DNA Designs]
Ephidelt490 is offline   Reply With Quote
Old 10-18-2007, 03:40 PM   #17
Tech Initiate
 
Join Date: Oct 2007
Posts: 23
Default

Thanks for the help, I will have another crack at it tomorrow.
Imperator is offline   Reply With Quote
Old 10-18-2007, 03:40 PM   #18
Tech Rookie
 
Join Date: Oct 2007
Location: Australia
Posts: 17
Default

Is the Carby actually getting fuel? when you prime the motor you should see the fuel going from the tank into the carby. A couple of ways to prime it you will have the bubble type primer bulb which sits in between the main fuel link give that a couple of squeeze's also put your finger over the stinger of the pipe while turning the engine over. And lastly you can also take off the fuel tubeing from the pipe and blow down it which also forces the fuel through, but be careful on that one a couple of times its backwashed and ive ended up with a mouth full of nitro.
When you say getting the engine to catch im taking it that it does turn over properly and the oneway bearing is not slipping?
Im guessing its probably your carby settings, take the airfilter off and you should always have a 1mm gap between the throttle slide and the inside of the carn houseing, maybe the idle is too low and the throttle is cut off this will cause the engine not to start if its closed off, so see if you have to increase the idle.
Also you can try putting a small amount of fuel directly into the carby through the throttle throat, just take off the air filter and squirt a little bit down, if you put too much in you could flood the engine, Basically if the engine starts and runs off of the small amout if fuel that you have put into the carb it means that you might have a airleak or the settings are out.
Although 90% of the time a engine is set up rich and ready to run from factory settings I have had a few engines which have been set too rich to get it too run or too lean.
Dont worry we will get it started..
Andy
AndyM is offline   Reply With Quote
Old 10-18-2007, 03:42 PM   #19
Tech Master
 
KThatcher's Avatar
 
Join Date: Aug 2007
Location: 1000 Oaks, Ca.
Posts: 1,845
Trader Rating: 64 (100%+)
Default

+1 above......and when it start for 5 sec how does it die does it gurgle or starve for fuel and sound like a 2 stroke dirt bike..Winggg dingggg dinggg ding
__________________
- Picco - Triton RC - 818 Designs - Team-CRP - RCRenew.com -
Pro Motion T-shirts -
KThatcher is offline   Reply With Quote
Old 10-18-2007, 03:44 PM   #20
Tech Initiate
 
Join Date: Oct 2007
Posts: 23
Default

When it started it sounded like the engine was running very fast, there was no sputtering or sounding like it could not get fuel, then after five seconds it cut off.
Imperator is offline   Reply With Quote
Old 10-18-2007, 03:55 PM   #21
Tech Master
 
KThatcher's Avatar
 
Join Date: Aug 2007
Location: 1000 Oaks, Ca.
Posts: 1,845
Trader Rating: 64 (100%+)
Default

try srewing in the High speed needle all the way NOT TOO TIGHT then backing it out 3 1/2 turns out.....if its starving 4 fuel it tooo lean..
__________________
- Picco - Triton RC - 818 Designs - Team-CRP - RCRenew.com -
Pro Motion T-shirts -
KThatcher is offline   Reply With Quote
Old 10-18-2007, 05:48 PM   #22
Tech Addict
 
Warhawk 1's Avatar
 
Join Date: Oct 2006
Location: Mishawaka, IN
Posts: 563
Default

+1 on K's post. As far as the glow plug goes, mine was bad straight from the hobby shop. I replaced it and viola!
Warhawk 1 is offline   Reply With Quote
Old 10-19-2007, 12:52 AM   #23
Tech Rookie
 
Join Date: Oct 2007
Location: Australia
Posts: 17
Default

Quote:
Originally Posted by Imperator View Post
When it started it sounded like the engine was running very fast, there was no sputtering or sounding like it could not get fuel, then after five seconds it cut off.
Try richening the low speed.!
AndyM is offline   Reply With Quote
Old 10-19-2007, 06:23 AM   #24
Tech Initiate
 
Join Date: Oct 2007
Posts: 23
Default

I tried intentionally flooding the engine, but I can't. I can see the fuel going into the engine when I use the primer bulb, but when I turn the engine over with the air filter and glow plug off, not a drop comes out. It all sprays out of the exhaust when I crank the engine.

I have tried every idea suggested in this thread with no success, now I'm worried it may be something more serious than a faulty glow plug.
Imperator is offline   Reply With Quote
Old 10-19-2007, 07:52 AM   #25
Tech Regular
 
rabidsquirrel's Avatar
 
Join Date: Jun 2006
Posts: 284
Trader Rating: 2 (100%+)
Default

Don't worry about it being something 'more serious'. In all likelyhood, it is the basic noob breaking in his first nitro scenario. You have know idea what to expect and are confused by every little thing the motor does.

I went through the exact same thing. Seemed to take forever to get it to run more than 5 seconds. Just stick with it. Your best bet is to take it down to your local track and have a knowledgeable racer there help you with it. They'll set you straight in no time.

Very hard to do this via text in a forum, although I commend everyone here trying their best to do just that!

rabidsquirrel is offline   Reply With Quote
Old 10-19-2007, 08:14 AM   #26
Tech Elite
 
DOMIT's Avatar
 
Join Date: Oct 2007
Location: Fort Worth, Texas, USA, North America, Earth, Solar System, Milky Way Galaxy, Universe
Posts: 4,034
Trader Rating: 1 (100%+)
Send a message via MSN to DOMIT Send a message via Yahoo to DOMIT
Default

Quote:
Originally Posted by rabidsquirrel View Post
Don't worry about it being something 'more serious'. In all likelyhood, it is the basic noob breaking in his first nitro scenario. You have know idea what to expect and are confused by every little thing the motor does.

I went through the exact same thing. Seemed to take forever to get it to run more than 5 seconds. Just stick with it. Your best bet is to take it down to your local track and have a knowledgeable racer there help you with it. They'll set you straight in no time.

Very hard to do this via text in a forum, although I commend everyone here trying their best to do just that!

Yup, what he said. Break in on new engines will try your patience, even with a starter box and heat gun!!!! Without those, it's much more difficult. Get an experienced person to help you... but the tips given in this thread will get you pointed in the right direction. Sounds like the glow plug is good, maybe the engine is too lean on the bottom end. It is helpful to have the batteries charged and radio hooked up, and an extra set of hands to blip the throttle when you're trying to start it... I'm not sure how much that helps on a GT with those ittty-bitty engines, but on buggy engines it helps a lot! And if you don't have a heat gun, try using a blow dryer on high. It's not as effective, but every little bit helps!
__________________
Brad "DOMIT" Smith - I'm not fast, but at least I wreck a lot.
Unsponsored, but I use/recommend: XRay XB9, Alpha A852, Dynamite 053, Airtronics M11, Hitec 5955TG & 7955TG, ABEC 35 clutch and chassis bearings, PTRCRacing shock and diff fluids, Ready Rollers ceramic engine bearings. ** Team Terribles Region 9 coordinator. ** JOIN TEAM TERRIBLES! All racers welcome! PM me for details.
DOMIT is offline   Reply With Quote
Old 10-19-2007, 09:01 AM   #27
Tech Initiate
 
Join Date: Oct 2007
Posts: 23
Default

Unfortunately I don't have a local track. The closest thing to it is a hobby shop that used to hold on-road races in their parking lot until the city made them stop.

They have a RC car department, but they prefer to charge by the hour and have me leave the truck with them rather than show me how to do it myself. Which would take all the fun out of it.

I'm still messing with it. I got fed up with the pull start so I busted out a drill (engine is dual start). Seems like it should be easier, but it still won't start.
Imperator is offline   Reply With Quote
Old 10-19-2007, 09:10 AM   #28
Tech Elite
 
Join Date: Oct 2004
Location: Michigan
Posts: 3,296
Trader Rating: 27 (100%+)
Default

Sounds like your best bet would go to teamassociated.com and get their phone number. Then give them a call and you can get some real time tips and answers. That sucks about the hobbyshop. Most I've been to charge also, but will do something as simple as helping start a motor for nothing.
jbrow1 is offline   Reply With Quote
Old 10-19-2007, 09:44 AM   #29
Tech Initiate
 
Join Date: Oct 2007
Posts: 23
Default

Something I just noticed, not sure if it is significant. I can't prime the engine with the primer bulb. No matter how hard I try to squeeze it, the gas in the line does not move.

Also, another question. I have been trying to start the engine once every half hour or so. After a few minutes of trying I hear the glow plug sizzle, and after that it does not glow when I check it in my glow starter. But after it dries the rings glow again as they should. Is this typical glow plug behavior?
Imperator is offline   Reply With Quote
Old 10-19-2007, 10:02 AM   #30
Tech Elite
 
Join Date: Oct 2004
Location: Michigan
Posts: 3,296
Trader Rating: 27 (100%+)
Default

Try opening the throttle up when you prime it. That helps alot.
I had an engine awhile ago that the high speed needle had a some gunk in it which plugged it up. Was fine after that was cleaned up.

You can unscrew the needle and take it out. Then unscrew the needle housing from the carb. Take a look at it and see if anything looks like it's plugged up.
jbrow1 is offline   Reply With Quote
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
Newbie Nitro Question zerotorc Malaysian R/C Racers 26 04-02-2014 04:05 AM
Grand Rapids flight areas to fly nitro: newbie question nfimich RC Flight 2 03-02-2008 03:38 PM
newbie .21 nitro question downunder23 Electric Off-Road 8 07-06-2006 10:15 AM
Newbie Nitro question AttackDonut Electric Off-Road 4 05-09-2005 09:50 PM
Nitro engine question - newbie question. BloodClod Singapore R/C Racers 6 09-11-2002 09:33 AM



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are Off



All times are GMT -7. It is currently 10:33 AM.


Powered By: vBulletin v3.9.2.1
Privacy Policy | Terms of Use | Advertise Content © 2001-2011 RCTech.net